Sand-blast nozzle



J. L. MATTHEWS.

l SAND BLAST NOZZLE. APPalcATloN FILED ocT.8,192o.

` Patented 001. 11, 1921.

UNITED STATES JOSEPH L. MATTHEWS, OF HIGHLAND PARK, NEW NATIONAL MOTOR COMPANY, OF NEW YORK, N.

WARE.

JERSEY, ASSIGN'OR TO INTER- Y., A CORPORATION OF DELA- SAND-BLAST NOZZLE.

Specification of Letters Patent.

Patented Oct. 11, 1921.

Application led October` 8, 1920. Serial No. 415,495.

To all whom z't may concern.'

Be it known that I, JOSEPH L. MATTHEWS, a citizen of the United States, residing at Highland Park, in the State of New Jersey, have invented certain new and useful lmprovements in Sand-Blast Nozzles, of which the following is a specification, reference being had to the accompanying drawing, forming a part hereof.

This invention relates to sand blast nozzles and is designed primarily with reference to nozzles used on the table type of sand blastmachine for sand blasting hardened parts. As the description proceeds, however, it will be evident that the invention can be adapted to nozzles of other types used in sand blasting operations in different arts.

The present problem has arisen in com mercial practice by reason of the short life and relatively high cost of the chilled iron nozzle in use. It has been found, in practice, that the average life of such a nozzle is only about thirty minutes after which its --bore becomes so abraded as to require the nozzle to be discarded. These nozzles are relatively expensive even when purchased in quantity and the number used results in the discarding of so many nozzles that the eX- pense becomes very burdensome. In accordance with the present invention it is proposed to provide a relatively wear resisting' material in the nozzle to direct the stream of sand. This material can be provided in the nozzle as a lining for the bore, as a tip, or the nozzle body can be formed of it. In the preferred construction, however, a metal body is `formed and either a liner or a tip of a ceramic or a composition thereof is so mounted within the metal body as to direct the stream of sand and protect the metal from the abrasive action thereof. rlhe commercial product known as stellite or porcelain has been found suitable for the purpose. Reference is now to be had to the accompanying drawing for a detailed description of illustrative embodiments of the invention, in which- Figure 1 is a view in section of a metal nozzle formed for the reception of a lining of wear resisting material. f

F ig. 2 is a view in section of the nozzle shown in Fig. 1 and showing such wear resisting liner in place.

such material as to resist it is preferred into the bore and desirable to pour let it set permanently therein, the bore of the nozzle being provided with recesses or the like so that the liner-material after it sets will be anchored permanently in pla-ce. In other. embodiments the nozzle may be provided with a tip of wear resisting material which tip may extend for a part only of the length of the bore or may extend throughout its length and will be removably secured to the nozzle for ready replacement.

In the embodiment illustrated in Figs. 1

and 2 the nozzle a is formed of metal and is cast with transverse corrugations a in its bore a2, these corrugations being shown as extending circumferentially of the bore. lt is evident that they may beof some other form and serve the intended purpose. Into the bore a2 of the nozzle is poured some ceramic or a composition thereof, such as porcelain or stelIite, this material being indicated at o in Fig. 2. lt will be molded as a liner directly into the corrugations a and is shown as extending throughout the length of the nozzle m and as providing the bore therefor. rllhe sand will have little or no abrading action on such a liner so that the useful life of the nozzle will be materially lengthened. Further, it is obvious that the liner can be replaced when broken or so worn as to become unsuitable.

yln the embodiment illustrated in Fig. 3 there is provided a molded removable liner B which can be slipped into the bore of the'nozzle A and retained in place by any suitable mechanical retaining devices.' For instance, one end of the nozzle A can be recessed and threaded, as indicated at A to receive a threaded flange B on the end of the liner B. This permits the liner to be readily secured removably in place. It will be evident to the skilled mechanic that other positive mechanical retaining devices migit be employed for holding the liner in place.

Further, it is apparent that While the liner is shown as extending throughout, the length of the bore of the nozzle A2 this liner inifht be molded as a tip and be inserted at eit er end of the nozzle and extend for only a portion of the length of the bore While receiving.

unit tor reeeone understood in the art 'would not he the moet practical or serviceable con- 15 struction.

What l claim is:

1. ln' a sand blast nozzle,

a lining of cerarnlc material.

2. ln a sand blast nozzlehaving a loodyl oi' 20..

metal, a liner for the bore thereof formed of ceramic material and means to secure said liner in place.

This specification signed this 4th day of 0ctober, A. D. 1920.

JSEPH L.,MATTHEWS. 

